You'd think with all the video done on Macs that there wouldn't be a problem in 2008. Just got a Macbook and Final Cut Express and it doesn't seem to want to import m2ts HD video files out of the box.
Marcel Fahle found a solution in the Squared 5 Converter but I didn't have any luck with it.
If you connect the camera to the Mac, it shows up as a hard drive. Final Cut Express can connect and import the videos using the Log and Transfer command under the File Menu.